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BORGFELDT & RITTERHOFF.

Granulating Tobac co. No. 78,860. Patented May 26, 1868.

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N. PETERS. PHOTd-LITHOGRAPHER. WASHINGTON, D. C.

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NICHOLAS H. 'IBORGFELDT AND FREDERICK W. RITTERHOFF, or NEW YORK. N. Y.

Ltteralatent No. 78,360, dated May 26,1868.

MAGHINE FOR GRANULAI'ING'AND FINISHING TOBABGO.

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TO ALL WHOM IT MAY CONCERN:

Be it known that we, NICIIOLAS H. Bonernnnr and FREDERICKW. Rrrrnnuorr, both of the city, county, and State of New York, have invented a new and improved Machine for Grauulating and Finishing Tobacco; and we do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference-beinghad to the accompanying drawing, forming part of this specification, in which drawing- 1 Figure 1 represents a longitudinal vertical section of this invention.

Figure 2 is a transverse section thereof.

Similar letters indicate corresponding parts.

This'invention relates to a machine which is intended particularly to facilitate the manufacture of killickinick and cigarette tobacco. The tobacco-scraps from which such tobacco is generally manufactured, are thrown into a hopper, which conducts the same to a cylindrical sieve surrounding a spiral brush, in such a manner that, by the action of the brush, a portion of'the tobacco-scraps are broken up and forced through the sieve, while that portion of the scraps which is not broken up is carried out at the end of the sieve by .the action of the spiral brush, said brush being so constructed that it bears on the tobacco-scraps with suificient force to break the same up, while it iscapable of yielding if it meets with a piece of wood or other hard substance mixed with the scraps, insu'ch a manner that such hard substances are worked out at the end of the sieve, without causing any injury to said sieve. The fine particles of tobacco, and thedust mixed therewith, pass down into a second sieve containing a separating-screw, in such a manner that the dustis worked through said sieve, while the finished tobacco is worked out through a suitable discharge.

A represents a hopper, which leads to one end of a cylindrical sieve, B. The opposite end of thissieve is open, as shown in-fig. 1, and in the interior of said sieve is placed a spiral brush, C, to which a revolving motion is imparted byhand or any other suitable power. I i

This brush is made of rattan, whalebone, wire, leather, or any other material of suiiicient stiffness and elasticity, and the bristles are made of such a lengtht hat they sweep closely past the inner surface of the sieve. By the action of the brush the scraps of tobaccointroduced through the hopper are worked along over the sieve, and a large portion of said scraps is broken and worked through the sieve, while the other unbroken portion of the scraps is worked out at the open end of the sieve, where the same is collected and again thr own into the hopper.

The advantage of our spiral brush over the unyielding rollers heretofore used in machines for granulating tobacco are twofold: firstly, the bristles of our brush, if they meet with a pieceof wood or other hard substance, yield and push such hard substance along on the sieve, without producing any injury on the sieve, whereas, if an unyielding roller acts on such hard substance, the sieve is liable to become torn; secondly, by the action of our spiral brush the unbroken portion of the scraps is discharged at the endot' the sieve automatically, and the operation of the machine can be continued without interruption. That portion of the tobacco-scraps which is broken up by the action of the spiral brush passes through the sieve B, down into the separating-sieve D, where it is acted on by the spiral flange The dust mixed'with the tobacco is caused to drop down through'the sieve D, and collects in the boxes F, while the finished tobacco is discharged through the aperture G, at the end of said sieve. Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-- In a device for granulat-ing and finishing tobacco, the arrangement of the spiral brushes, cylindrical sieve B, conveyer-screw E, cylindrical sieve D, and the discharges F G, whenconstructed and operating as herein described.

This'specificatiousigued by us, this 20th day of March, 1868.

NICHOLAS H. BORGFELD'I, F. W. RITTERHOFF.

Witnesses:

W. Hnurr, E. F. Knsrnuuuzeun. 

